On 12-05-2010 05:55, Chaitanya kumar CH wrote:
Joaquim,
On Wed, May 12, 2010 at 5:07 AM, Joaquim Luis jl...@ualg.pt
mailto:jl...@ualg.pt wrote:
Hi,
Before filling a ticket I would like to ask here if this gdalwarp
behavior is the intended one.
When I convert a grid from
Hi folks,
I am currently implementing a tool to allow band-to-band computations on
array values out of 2 images with different projection and different
resolution in python.
The operation is quite complex, so I will summarize it here and below give
the solution I am currently testing to see if
Matthieu Rigal wrote:
Hi folks,
I am currently implementing a tool to allow band-to-band computations on
array values out of 2 images with different projection and different
resolution in python.
The operation is quite complex, so I will summarize it here and below give
the solution I am
Joaquim,
GDALSetRasterNoDataValue() sets only the metadata. It doesn't actually
change the nodata pixels. We need to process each pixel to do this. Or you
could just create a VRT mentioning the source and vrt nodata values.
http://www.gdal.org/gdal_vrttut.html
On 12-05-2010 15:58, Chaitanya kumar CH wrote:
Joaquim,
GDALSetRasterNoDataValue() sets only the metadata. It doesn't actually
change the nodata pixels. We need to process each pixel to do this. Or
you could just create a VRT mentioning the source and vrt nodata values.
Chaitanya,
Joaquim,
I believe what you see is the expected behaviour.
You must keep in mind that there are 2 notions :
1) nodata value -- setting it is no more than just setting a tag on the
raster band. It doesn't change the pixel values by itself as Chaintanya
explained
2) initialization of the pixel
Even,
Thanks, I understand it better now and made some advances but I'm still facing
some troubles.
For example, if I do this
papszWarpOptions = CSLSetNameValue(papszWarpOptions, INIT_DEST, 300 );
psWO-papszWarpOptions = CSLDuplicate(papszWarpOptions);
than it works fine.
However, if I do
Le Wednesday 12 May 2010 23:15:08 Joaquim Luis, vous avez écrit :
Even,
Thanks, I understand it better now and made some advances but I'm still
facing some troubles.
For example, if I do this
papszWarpOptions = CSLSetNameValue(papszWarpOptions, INIT_DEST, 300 );
psWO-papszWarpOptions =
papszWarpOptions = CSLSetNameValue(papszWarpOptions, INIT_DEST, nan );
than I get zeros again in place of the nodata.
Works for me. You'll have to use your debugger I'm afraid
For the rec, VS2010 and a quite recent trunk version.
papszWarpOptions =
